rickets is a nutritional disorder that can develop if you do not get enough vitamin d calcium or phosphate rickets leads to poor functioning of a bone s growth plate growing edge softened and weakened bones stunted growth and in severe cases skeletal deformities
Hence, a 20-year period of the patent usually gives manufacturers a chance to recoup the cost of developing a new drug. When a drug patent expires, any pharmaceutical company can manufacture and sell the drug. A drug, which is produced and distributed without patent protection is called a generic drug.
This is the most expensive protection to obtain--about $7,000 to $10,000--and takes on average three to seven years to secure. It lasts 20 years. A design patent protects the look of a product (anything from handbags to furniture). As with a utility patent, the look must be novel and nonobvious. Typically these patents take 12 to 18 months to secure, cost an average of $2,500 to $3,500 and stay in effect for 14 years.